package filter;

import bean.EmpBean;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebFilter(filterName = "LoginFilter",value ="/vip/*")
public class LoginFilter implements Filter {
    public void destroy() {
    }

    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {

        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
        HttpSession session = request.getSession();
        //存对象的作用是为了方便查询它的权限
       EmpBean empBean = (EmpBean) session.getAttribute("emp");

        if(empBean!=null){
            chain.doFilter(req, resp);
        }else{
            response.sendRedirect("index.jsp");
        }


    }

    public void init(FilterConfig config) throws ServletException {

    }

}
